package com.changgou.goods.service.impl;

import com.changgou.goods.dao.SkuMapper;
import com.changgou.goods.service.SkuService;
import com.changgou.goods.pojo.Sku;
import com.changgou.order.pojo.OrderItem;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import tk.mybatis.mapper.entity.Example;

import java.util.List;
import java.util.Map;

@Service
public class SkuServiceImpl implements SkuService {

    @Autowired
    private SkuMapper skuMapper;

    @Autowired
    private RedisTemplate redisTemplate;

    /**
     * 查询全部列表
     *
     * @return
     */
    @Override
    public List<Sku> findAll() {
        return skuMapper.selectAll();
    }

    /**
     * 根据ID查询
     *
     * @param id
     * @return
     */
    @Override
    public Sku findById(String id) {
        return skuMapper.selectByPrimaryKey(id);
    }


    /**
     * 增加
     *
     * @param sku
     */
    @Override
    public void add(Sku sku) {
        skuMapper.insert(sku);
    }


    /**
     * 修改
     *
     * @param sku
     */
    @Override
    public void update(Sku sku) {
        skuMapper.updateByPrimaryKey(sku);
    }

    /**
     * 删除
     *
     * @param id
     */
    @Override
    public void delete(String id) {
        skuMapper.deleteByPrimaryKey(id);
    }


    /**
     * 条件查询
     *
     * @param searchMap
     * @return
     */
    @Override
    public List<Sku> findList(Map<String, Object> searchMap) {
        Example example = createExample(searchMap);
        return skuMapper.selectByExample(example);
    }

    /**
     * 分页查询
     *
     * @param page
     * @param size
     * @return
     */
    @Override
    public Page<Sku> findPage(int page, int size) {
        PageHelper.startPage(page, size);
        return (Page<Sku>) skuMapper.selectAll();
    }

    /**
     * 条件+分页查询
     *
     * @param searchMap 查询条件
     * @param page      页码
     * @param size      页大小
     * @return 分页结果
     */
    @Override
    public Page<Sku> findPage(Map<String, Object> searchMap, int page, int size) {
        PageHelper.startPage(page, size);
        Example example = createExample(searchMap);
        return (Page<Sku>) skuMapper.selectByExample(example);
    }

    /**
     * sku物理删除
     *
     * @param id
     */
    @Override
    public void realDelete(String id) {

        Sku sku = new Sku();
        sku.setSpuId(id);
        List<Sku> skuList = skuMapper.select(sku);

        if (skuList != null) {
            for (Sku sku1 : skuList) {
                skuMapper.deleteByPrimaryKey(sku1.getId());
            }
        }
    }

    /**
     * 递减库存
     *
     * @param username
     */
    @Transactional
    @Override
    public void decrCount(String username) {

        List<OrderItem> orderItems = redisTemplate.boundHashOps("cart_" + username).values();
        for (OrderItem orderItem : orderItems) {
            int count = skuMapper.decrCount(orderItem);
            if (count <= 0) {
                throw new RuntimeException("库存不足，递减失败！");
            }
        }
    }

    /**
     * 构建查询对象
     *
     * @param searchMap
     * @return
     */
    private Example createExample(Map<String, Object> searchMap) {
        Example example = new Example(Sku.class);
        Example.Criteria criteria = example.createCriteria();
        if (searchMap != null) {
            // 商品id
            if (searchMap.get("id") != null && !"".equals(searchMap.get("id"))) {
                criteria.andEqualTo("id", searchMap.get("id"));
            }
            // 商品条码
            if (searchMap.get("sn") != null && !"".equals(searchMap.get("sn"))) {
                criteria.andEqualTo("sn", searchMap.get("sn"));
            }
            // SKU名称
            if (searchMap.get("name") != null && !"".equals(searchMap.get("name"))) {
                criteria.andLike("name", "%" + searchMap.get("name") + "%");
            }
            // 商品图片
            if (searchMap.get("image") != null && !"".equals(searchMap.get("image"))) {
                criteria.andLike("image", "%" + searchMap.get("image") + "%");
            }
            // 商品图片列表
            if (searchMap.get("images") != null && !"".equals(searchMap.get("images"))) {
                criteria.andLike("images", "%" + searchMap.get("images") + "%");
            }
            // SPUID
            if (searchMap.get("spuId") != null && !"".equals(searchMap.get("spuId"))) {
                criteria.andEqualTo("spuId", searchMap.get("spuId"));
            }
            // 类目名称
            if (searchMap.get("categoryName") != null && !"".equals(searchMap.get("categoryName"))) {
                criteria.andLike("categoryName", "%" + searchMap.get("categoryName") + "%");
            }
            // 品牌名称
            if (searchMap.get("brandName") != null && !"".equals(searchMap.get("brandName"))) {
                criteria.andLike("brandName", "%" + searchMap.get("brandName") + "%");
            }
            // 规格
            if (searchMap.get("spec") != null && !"".equals(searchMap.get("spec"))) {
                criteria.andLike("spec", "%" + searchMap.get("spec") + "%");
            }
            // 商品状态 1-正常，2-下架，3-删除
            if (searchMap.get("status") != null && !"".equals(searchMap.get("status"))) {
                criteria.andEqualTo("status", searchMap.get("status"));
            }

            // 价格（分）
            if (searchMap.get("price") != null) {
                criteria.andEqualTo("price", searchMap.get("price"));
            }
            // 库存数量
            if (searchMap.get("num") != null) {
                criteria.andEqualTo("num", searchMap.get("num"));
            }
            // 库存预警数量
            if (searchMap.get("alertNum") != null) {
                criteria.andEqualTo("alertNum", searchMap.get("alertNum"));
            }
            // 重量（克）
            if (searchMap.get("weight") != null) {
                criteria.andEqualTo("weight", searchMap.get("weight"));
            }
            // 类目ID
            if (searchMap.get("categoryId") != null) {
                criteria.andEqualTo("categoryId", searchMap.get("categoryId"));
            }
            // 销量
            if (searchMap.get("saleNum") != null) {
                criteria.andEqualTo("saleNum", searchMap.get("saleNum"));
            }
            // 评论数
            if (searchMap.get("commentNum") != null) {
                criteria.andEqualTo("commentNum", searchMap.get("commentNum"));
            }

        }
        return example;
    }

}
